Backpack for cooler



FIG. 1 is a perspective view of the top, back and left side of a backpack for cooler showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a front view thereof.

The broken lines shown throughout the views are understood to represent stitching. 

The ornamental design for a backpack for cooler, as shown and described. 